PYTHON-3453 Test failure - Enterprise Auth Windows 64 Python 3.7 (#1072)

Author: blink1073

.evergreen/config.yml

@@ -493,8 +493,27 @@ functions:
         silent: true
         working_dir: "src"
         script: |
-          # DO NOT ECHO WITH XTRACE (which PREPARE_SHELL does)
-          PYTHON_BINARY=${PYTHON_BINARY} SASL_HOST=${sasl_host} SASL_PORT=${sasl_port} SASL_USER=${sasl_user} SASL_PASS=${sasl_pass} SASL_DB=${sasl_db} PRINCIPAL=${principal} GSSAPI_DB=${gssapi_db} KEYTAB_BASE64=${keytab_base64} PROJECT_DIRECTORY=${PROJECT_DIRECTORY} bash ${PROJECT_DIRECTORY}/.evergreen/run-enterprise-auth-tests.sh
+          cat <<EOT > prepare_enterprise_auth.sh
+          export SASL_HOST=${sasl_host}
+          export SASL_PORT=${sasl_port}
+          export SASL_USER=${sasl_user}
+          export SASL_PASS=${sasl_pass}
+          export SASL_DB=${sasl_db}
+          export PRINCIPAL=${principal}
+          export GSSAPI_DB=${gssapi_db}
+          export KEYTAB_BASE64=${keytab_base64}
+          EOT
+    - command: shell.exec
+      type: test
+      params:
+        working_dir: "src"
+        script: |
+          # Disable xtrace (just in case it was accidentally set).
+          set +x
+          . ./prepare_enterprise_auth.sh
+          rm -f ./prepare_enterprise_auth.sh
+
+          PYTHON_BINARY=${PYTHON_BINARY} PROJECT_DIRECTORY=${PROJECT_DIRECTORY} bash ${PROJECT_DIRECTORY}/.evergreen/run-enterprise-auth-tests.sh
 
   "run atlas tests":
     - command: shell.exec